Improvement in btjrghiak-aiiarm



I. N. BUCK. Burglar. Alarm.

Paiented Dec; 22, 1868.

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Letters Patent No. 85,066,

dated December 22, 1868.

The Schedule referred to in these Letters Patent and making part of the same.

To whom it ma/y'cmwem: 1

Be it known that I, ISAAC N. BUCK, of the city of Elgin, county of Kane, State of Illinois, have invented a certain new and improved Burglar-Alarm; and I do hereby declare the following to be a clear and exact description thereof, reference being bad to the accompanying drawings.

Figure 1 represents the interior of a case containing one of my alarms. A represents the case or shell. B represents the striking-apparatus, similar tothat in most clocks, and containing nothing novel in its nature.

.0, the bell forgiving alarm. D, the vibrating rod, which controls the action of the striking-mechanism.

- D D, a stud, against which the rod D rests, and by which it is held in position when no alarm is desired.

' E represents a sliding bolt, one. endof which pro-. jectsthroughthe case, as that of any common lock.

F represents a key-bolt, placed perpendicnlarlyin the case, the-upper end of which, by contact with the shoulder shown-on sliding bolt E, prevents its advancingbeyoud the case, fi'omjpressure of the spring next described.

H represents a wire spring, attached to' a stud, as shown at H H, being at its upper end in contact with pressure against the pin; or stud in-slidin'gbolt E, as

shown at pointE E, and at its lower end against pin F E. Its oflice is to not only steady the key-bolt F, but to' cause such pressure as will throw the sliding bolt forward, if released by the downward movement of the key-bolt, caused by turning the key, when in- This figure represents my alarm before being set for operation. Y

The .mode of applying the apparatus is .by insertion into the door-casing orvjamb,'so that the sliding bolt E would comcin contact withthe back edge .of the door'when closed p During the day, the key-bol'tF being raised to pothe door is closed, the key-bolt F drawn down by the interposition of the key at G, permitting 'thesliding bolt E to rest, with its pressure from spring H, against the edge of the door.

Should the door be opened, it is obvious that theof the door, thus releasing the vibrating rod at D D, causing the pallet-escapementwheel and hammer to operate, sounding the bell rapidly and loudly, giving the alarm. I j h Figure 2 represents, as in fig.'1, similar parts, let-. tered alike, and diflers from that, in having the keybolt drawn down, the sliding bolt advanced, and the alarm free to operate.

It is plainly seen that my alarm can as well be applied to the threshold, side, or top of a door-fiame-or door, to the sill of a window-frame or its side, and work the same result as that which has already been described;

I am aware'that many burglar-alarms have been invented and used, iu-which clock-work constituted the striking-mechanism, in connection with a bell. 4

I therefore claim as my own invention, and desire to secure by Letters Patent- '1." Thesliding boltE, with its studs E E and DD, arranged and operating in connection with the vibrat-' ing or pallet-rod D, substantially as described.

2. The key-bolt F,- arranged and operating substantially as described. 4

3; The key-bolt F, spring H, sliding bolt E, and the strikingmechanism, arranged substantially as described, for the purposes specified.

' ISAAC N. BUCK. -Witne sses:

THos. W. 0010s,, J. O'r'ro WEDELL.

sliding bolt E would advance, following the movement 

